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Period: to
Emigration to North America slowed
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More than two-thirds of the white population was of British origin, with Germans and Dutch next in importance.
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Ensus indicated that 20 percent of the American population was of African origin.
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Period: to
Immigration tended to increase with each passing decade.
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Period: to
Most migrants continued to come from northwestern Europe.
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The U.S. Bureau of the Census was able to announce that the American settlement frontier was gone entirely.
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Well over four-fifths of all immigrants were from these areas of Europe, especially Italy, Austria-Hungary, and Russia.
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The United States passed its first major legislation to restrict immigration.
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He number of arrivals has increased somewhat.
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Period: to
U.S. population statistics for the 1970s and 1980s suggest that a fourth major mobility period is at hand. Areas that had long experienced no change or even declining population size are growing.
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Population.
In 1990, the United States had a population approaching 250 million, with a density of roughly 235 people per square kilometer. Three principal zones of population can be identified.